Half to jane halliwell



(No fiode'l.)

-J. S. SAGKETT.

. MECHANICAL MOVEMENT. I No. 279,441. Patented June 12,1883} n. PETERS. mwum har. Washington. 0.1;

UNITED STATES PATENT OFFICE.

JOSEPH S. SACKETT, OF HAVEN, CONNECTICUT, ASSIGNQR OF ONE HALF TO JANE HALLIWELL, OF SAME PLACE.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 279,441, dated June 12, 1883.

' Application filed April 27, 1883. (No model.) i

To all whom it may concern: 7

Be itknown that I, J OSEPH S. SAOKETT, of New Haven, in the county of New Haven and State of Conecticut, have invented a new Improvement in Mechanical Movements; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figures 1, 2, and 3, top views of the pawl and ratchet in diiferent positions.

- This invention relates to a device for converting reciprocating into rotary movement, and may be used as a substitute for the common pawl and ratchet, the object of the invention being to construct the pawl so that without the intervention of springs it may operate upon the ratchet in both directions in its reciprocating movement; and it consistsin the construction of the pawl, as hereinafter described, and more particularly recited in the claim.

A represents the toothed ratchet, arranged, say, upon the shaft a in the usual manner. The pawl consists of two arms, b a, connected by a body, 11, thenose of one, 12, arranged to work in one direction, and the nose of the other, e, in the opposite direction. The distance between'the nose of the two pawls is less than the distance between the point of one tooth and the point of the tooth diametrically opposite, or less than the extreme diameter of the ratchet.

Suppose the pawl to stand in the position seen in Fig. 1. As the pawl advances the end of the pawl c rides up the incline of the next tooth,

e, and in this movement is thrown away from the center, drawing the other pawl, 1), into engagement with its next tooth, f, as seen in Fig. 2. Continuing its movement, the pawl b turns the ratchet until the pawl arrives at its extreme movement, as seen in broken lines, Fig. 2. Then on the return the nosebwill ride back on the incline of the next tooth, h, that incline throwing the pawl b outward and drawing the other pawl inward into engagement with its next tooth,'i, as seen in Fig. 3, and when so engaged the movement will continue until it arrives at the opposite extreme, as seen in Fig. 1. Thus each pawl act's not only to turn the wheel in its respective direction, but to draw the opposite pawl into engagement as itself is thrown out by the incline of the tooth over which it is passing, the one pawl, b, serving to turn the ratchet one-step, the other pawl, c, on the return serving to turn the ratchet in the opposite direction, and thus at each free reciprocating movement of the pawl the ratchet is turned two points.

I claim- The combination of the ratchet A, its teeth inclined upon their backs, the double pawl 12 0, their respective noses engaging the teeth of the ratchet, one in one direction and the other in the opposite, one drawn into engagement by the movement of the other over the incline of the back of its next tooth, substantially as described.

JOSEPH s. SAOKETT. 

